We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Subject / Started by Last post
0 Replies
334 Views
Last post February 18, 2023, 0000 UTC
by DangerKitty
10 Replies
1602 Views
Last post October 12, 2023, 0017 UTC
by JustGreg
9 Replies
1165 Views
Last post January 21, 2023, 2301 UTC
by Markokpik
19 Replies
2373 Views
Last post March 06, 2024, 1243 UTC
by ChrisSmolinski
38 Replies
3707 Views
Last post November 01, 2023, 1956 UTC
by wmrscotland
9 Replies
679 Views
Last post August 10, 2025, 0140 UTC
by ChrisLobdell
5 Replies
603 Views
Last post January 11, 2025, 0249 UTC
by N2MLP
4 Replies
258 Views
Last post August 31, 2025, 0242 UTC
by Molvania Poacher
22 Replies
3129 Views
Last post October 31, 2023, 2204 UTC
by Ray Lalleu
6 Replies
929 Views
Last post September 14, 2024, 2026 UTC
by ChrisSmolinski
14 Replies
1580 Views
Last post March 30, 2024, 0220 UTC
by Dr. Strangelove
4 Replies
1177 Views
Last post June 05, 2025, 0128 UTC
by J. Carlos Pérez Montero
10 Replies
660 Views
Last post August 29, 2025, 0136 UTC
by Radiouser
15 Replies
2483 Views
Last post October 30, 2023, 0406 UTC
by canswl
13 Replies
728 Views
Last post August 03, 2025, 0110 UTC
by William Hassig
15 Replies
1149 Views
Last post January 02, 2025, 0123 UTC
by Crater Eddie
0 Replies
207 Views
Last post July 04, 2025, 2239 UTC
by DangerKitty
15 Replies
3160 Views
Last post May 31, 2025, 2334 UTC
by Ron Hunsicker
6 Replies
921 Views
Last post July 09, 2023, 1407 UTC
by ChrisSmolinski
5 Replies
1036 Views
Last post October 28, 2023, 2100 UTC
by aurora

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns